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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>使用outline-color翻转轮廓</title>
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    <style>
        p.ex1 {
            border: 1px solid yellow;
            outline-style: solid;
            outline-color: invert;
        }
    </style>
    <h1>使用 outline-color:invert</h1>

    <p class="ex1">invert 实线轮廓</p>


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